Miller Street over Unnamed Canal
St. Clair County, Michigan · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Miller Street over Unnamed Canal in St. Clair County, Michigan, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1956 and reconstructed in 2013, making it 69 years old at the 2025 inventory.
- It carries about 252 vehicles a day (traffic count year 1994).
- Its listed owner is the county highway agency.
- It is one of 31 of the 326 inventoried bridges in St. Clair County rated poor (9.5%); 31 (9.5%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- It was rated fair in the 2024 inventory and is now poor (superstructure 6 to 5, substructure 5 to 4).
- Its most recent inspection on record is dated March 2024, on a 12-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.67844, -82.65818)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 5 | Fair condition |
| Substructure | 5 | 4 | Poor condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 20 ft |
| Location | Sec. 22 Ira Twp. |
| NBI structure number | 000000000010187 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | March 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in St. Clair County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-94 over Stocks Creek Drain | 2011 | 50,660 | Good |
| I-94 & I-69 over M-25 Pine Grove Ave | 1993 | 43,238 | Good |
| M-25 over Black River Spillway | 2000 | 40,250 | Fair |
| I-94 over Stocks Creek | 1964 | 29,650 | Fair |
| M-25 over Howe Drain | 1981 | 28,550 | Fair |
| I-94 & I-69 WB over Black River & Scott Ave | 2011 | 26,010 | Fair |
All bridges nearby: St. Clair County, MI bridge conditions · every bridge in St. Clair County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.